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| PartNumber | MAX6421US22-T | MAX6421US21+T | MAX6421US20+T |
| Description | Supervisory Circuits | Supervisory Circuits Single uPower Reset Circuit | Supervisory Circuits Single uPower Reset Circuit |
| Manufacturer | - | Maxim Integrated | Maxim Integrated |
| Product Category | - | PMIC - Supervisors | PMIC - Supervisors |
| RoHS | - | Details | Details |
| Mounting Style | - | SMD/SMT | SMD/SMT |
| Package / Case | - | SOT-143-4L | SOT-143-4L |
| Threshold Voltage | - | 1.6 V to 5 V | 1.6 V to 5 V |
| Number of Inputs Monitored | - | 1 Input | 1 Input |
| Output Type | - | Active Low Push-Pull | Active Low Push-Pull |
| Manual Reset | - | No Manual Reset | No Manual Reset |
| Battery Backup Switching | - | No Backup | No Backup |
| Supply Voltage Max | - | 5.5 V | 5.5 V |
| Maximum Operating Temperature | - | + 125 C | + 125 C |
| Series | - | MAX6421US | MAX6421US |
| Packaging | - | Reel | Reel |
| Brand | - | Maxim Integrated | Maxim Integrated |
| Chip Enable Signals | - | No Chip Enable | No Chip Enable |
| Minimum Operating Temperature | - | - 40 C | - 40 C |
| Operating Supply Current | - | 2.5 uA | 2.5 uA |
| Overvoltage Threshold | - | 2.153 V | 2.05 V |
| Pd Power Dissipation | - | 320 mW | 320 mW |
| Power Fail Detection | - | No | No |
| Reset Delay Time | - | 4.375 ms | 4.375 ms |
| Supply Voltage Min | - | 1 V | 1 V |
| Type | - | Voltage Supervisory | Voltage Supervisory |
| Undervoltage Threshold | - | 2.048 V | 1.95 V |
| Watchdog Timers | - | No Watchdog | No Watchdog |
| Part # Aliases | - | MAX6421US | MAX6421US |